goodislands
Heres a nice sandbox map with tons of islands to be explored.
Set the water height in ACM to 200.
There is only 1 spawn box, so add more and save it if you want to invite friends.
Just have sprout enabled and load it right up!
It includes lots of roads and 2 tunnels.
Download
Sprout — Steam Workshop
AddCustomModuleMod — Steam Workshop
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Sprout — Steam Workshop
AddCustomModuleMod — Steam Workshop